RED-BREASTED MERGANSER
Mergus serrator
DESCRIPTION
The Red-breasted Merganser is a medium-sized diving duck known for its distinctive slender body and long, narrow bill. Males are characterized by their striking green head and reddish-brown breast, while females are mottled brown with a distinctive rusty-colored head.
FUN FACTS
- Red-breasted Mergansers are known for their unique serrated bills, which help them grip slippery fish | They can dive to depths of over 20 meters in search of food | Males often display elaborate courtship behaviors during the breeding season
QUICK INFO
Lifespan5-10 years in the wild
Average Weight0.7-1.5 kg
Average Length60-70 cm
Diet TypePiscivore
Social Structurepair, often seen in small groups during migration
Activity PatternDiurnal
Breeding SeasonSpring (April-June)
- Habitat
- Red-breasted Mergansers are typically found in freshwater and coastal marine environments, including lakes, rivers, and estuaries. They prefer areas with abundant aquatic vegetation and open water for foraging.
- Biomes
- Freshwater, Marine
- Native Range
- They breed in northern regions of North America and Eurasia, migrating south during winter to coastal areas.
- Continent
- North America, Europe, Asia
- Countries
- Canada, United States, Norway, Sweden, Russia
- Diet
- This species primarily feeds on fish, but it also consumes crustaceans and aquatic invertebrates. They are skilled divers, often foraging underwater to catch their prey.
- Diet Type
- Piscivore
- Favorite Food
- fish
- Social Structure
- pair, often seen in small groups during migration
- Activity Pattern
- Diurnal
- Group Size
- 2-10
- Territorial
- 0
VU
0.7-1.5 kg
Weight
60-70 cm
Length
- Coloration
- Males have a green head, white neck, and reddish-brown breast; females are brown with a rusty head.
- Sexual Dimorphism
- Males and females have distinct coloration and size differences.
- Lifespan
- 5-10 years in the wild
- Offspring per Birth
- 6-12
- Sexual Maturity
- 1 year
- Breeding Season
- Spring (April-June)
LC
Least Concern
IUCN Red List Status
- Population Status
- The population is currently stable, but local declines may occur due to habitat loss.
- Wild Population Estimate
- 100,000-200,000
- Population Trend
- Stable
- Endangered
- 0
- Threats
- Main threats include habitat destruction, pollution, and hunting. Climate change also poses a risk to their breeding habitats.
- Predators
- Large birds of prey, foxes, and humans
- Defense Mechanisms
- They rely on their swimming ability and speed to evade predators.
- Found in Zoos
- Uncommon